Filter.



O. E. SINGER.

FILTER.

APPLIOATION FILED FEB. 7, 1911.

Patented Feb. 13, 1912.

2 SHEETS-SHEET 1.

Witnesses Attorneys C. E. SINGER.

FILTER.

APPLICATION FILED FEB. 7, 1911.

1,017,476. Patented Feb. 13, 1912.

2 SHEETS-SHEET 2.

Inventor Attorneys UNITED r orr on.

FILTER.

Specification of Letters Patent.

Patented Feb. 13, 1912.

Application filed February 7, 1911. Serial No. 607,120.

To all whom it may concern:

Be it known that I, CHARLES E. SINGER, a citizen of the United States, residing at Parral, in the county of Hidalgo and State of Chihuahua, Republic of Mexico, have invented a new and useful Filter, of which the following is a specification.

It is the object of this invention to provide novel means for applying suction and ejecting fluid pressure, alternately, to amtating filter frame.

Another object of the invention is to proyide a filter frame of novel and improved construction, and to supply novel means whereby the interior of the frame may be subjected, alternately, to suction and to ejecting fluid pressure. I

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the com bination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings,Figure 1 shows the invention in side elevation, parts being broken away; Fig. 2 is a side elevation of one of the sectors of the filter frame, together with portions of the supporting and valve-operating mechanism; Fig. 3 is a transverse section on the line AB of Fig. 1; andFig. 4 is a section of one of the filter frames and the valve mechanism, the cutting plane being at right angles to 'the plane of revolution of the filter frame, I

The structure herein disclosed, is a revolving vacuum filter for removing the liq-' uid from slimes, sands, pulp or the like. an operation common to paper making and various metallurgical operations.

The supporting structure may include a base 1, upon which is superposed a tank 2. Fixed to and rising from the base 1 is a frame 3, of any desired construction, the frame 3 being provided with bearings %4' in which a hollow shaft 5 is mounted for rotation. The shaft 5 may be actuated by a sheave 6, or in any other suitable manner.

The shaft 5 is adapted to receive compressed air, water, or other fluid under pres- .sure, the shaft 5 being united by a frame defined by the spokes 12 and the rim 14, is

supported coupling 7, with a fixed supply pipe 8. Telescoped within the shaft 5 is a suction pipe 9, united with a fixed suction pipe 10 by means of a coupling 11.

The tubular members 5 and 9 are united for simultaneous rotation, as will be described hereinafter, the couplings 7 and 11 obviously permitting the tubular members 5 and 9 to rotate, the pipes 8 and 10 remaining fixed. It will of-course be understood, without specific illustration, that the tubular member 5 is'closed at one end, as shown at 50, adjacent the bearing 4, the tubular "member 9 being closed at one end, as shown at 51, adjacent the bearing 4.

Secured to the shaft 5 for rotation therewith, are a plurality of filter frames, adapted to dip into the tank 2. There may be any number of these filter frames, but since their constructions are identical, but one of them will be described. Each filter frame, then, comprises a plurality of spokes 12, secured to and radiating from the shaft 5, these spokes being united at their free ends by a rim 14. Located within each sector an auxiliary frame 15. This frame 15 is fashioned from pipes, and 'is held in. place by means of bolts 16, or other securing elements adapted to a like end, uniting the auxiliary frame 15 with the rim 14. The auxiliary frame 15 is further held in place by means of a pipe 17 uniting the apex of the frame with a valve casing 18. From this valve casing 18, a pipe 19 extends into the shaft 5, a pipe 20 uniting the valve casing 18 with the pipe 9 which is located within the shaft 5. These pipes 19 and 20 serve to unite the shaft 5 and the suction pipe 9 for simultaneous rotation in the bearings 4 and 4'.

Rotatably mounted within the valve casing 18, is a valve 21. This valve 21 may be of any desired construction, its function being to open and to close, alternately, the

pipes 19 and 2 0. Protruding from one end 100 and 9. The manner in which this frame 26' is fixedly held, is to a large extent immaterial, but one means for supporting the frame 26, will be described hereinafter.

' Disposed between the filter frames, and

preferably upheld upon the tank 2 and the framework 3, are a plurality of troughs 27, the troughs being extended at one end beyond the tank 2, to communicate with the repulping box 28, the troughs being downwardly inclined, so as .to discharge their contents into the repulping box. The repulping box is employed when the structure herein disclosed, is used in series, the repulping box 28 of one machine discharging into the tank 2 of another machine. If desired, the troughs 27 may be supplied with brackets 29, connected to the rack frames 26, to hold the rack frames rigidly in place.

The troughs 27 are equipped. upon their' upper edges with laterally projecting scrapers 30, the outer edges of which are positioned adjacent a covering 31 of filtering material, surrounding the auxiliary frames 15, the frames 15 being perforated, as shown at 32, within the contour of the filter covering 31.

The operation of the device is as follows: The tank 2 is filled with pulp or the like, from which the sediment is tobe removed, and the shafts 5 and 9 are put into rotation, causing one auxiliary frame 15 after another, to dip into the material in the tank 2, and to rise above the surface of such material. As each auxiliary frame 15 enters the material in the tank 2, suction is applied to the interior of the filter covering 31, thus causing the sediment in suspension in the tank 2, to adhere in the form of a cake,

to the filter covering. The suction within the interior of the filter covering 31 will hold the cake in place, until the particular auxiliary frame is rotated into close proximity to the scrapers 30. At this point, the suction within the auxiliary frame will be out OK, and pressure is then applied to the interior of the auxiliary frame, this pressure serving to displace the cake from the auxiliary frame, the scrapers 30 receiving the cake, and depositing the same in the repulping box 28. The manner in which suction and pressure is applied to the interior of the filter covering 31 of each auxiliary frame, is as follows: Noting Fig. 2, and comparing the same with Fig.4, let it be supposed'that the auxiliary frame 15 of Fig. 2 is swinging downwardly, in the direction of the arrow X, and about to enter the tank 2. The pinion 23, as it engages with the rack 24, will rotate the valve 21, establishing communication, by way of ther'pipe 20, between the suction pipe 9 and the tubular aum'liary frame 15. This suction will be communicated by the perforations 32, to the covering 31, and will assist in the formation of a cake upon the covering, as the particular auxiliary frame passes through the contents of the tank. The suction upon the filter covering 31 will be maintained until the auxiliary frame has passed out of the tank, and been rotated into a position above the scrapers 30. At this point, the pinion 33 will come into engagement with one end of the rack 25, the valve 21 being rotated. The initial rotation of the valve 21, by means of the rack 25, will serve to cutofi the suction pipe 20, the final rotation of the valve 21, by means of the rack 25, serving to open the pipe 19, and to subject the interior of the auxiliary frame 15, to fluid under pressure. This fluid pressure will tend to displace the cake which has been formed upon the filter covering 31. The pressure upon the filter covering will be maintained. during the time that the pinion 23 is passing from the rack 25 to the rack 24. The initial engagement between the pinion 23 and the rack 24 will serve to cut ofi the fluid pressure supply, the ultimate engagement between the inion' 23 and the rack 24 serving, as herein efore mentioned, to open the pipe 20, andto establish again, suction within the contour of the auxiliary frame 15. Preferably, however, the valve 21 is provided with sinuous ports 100 therethrough, adapted suc-' cessively, when the valve 21 is disposed in successive positions of rotation, to establish communications between the pipes 19 and 20, and the pipe '17.

Having thus described the invention, what is claimed is 1. In a device of the class described, a supporting structure; telescoped tubular members secured together for simultaneous rotation in the structure; a filter frame secured th the outer of said members; a tank into which the frame is adapted to dip; connections between the interiors of both members and the interior of the frame; a valve casing interposed in the connections; a valve rotatable in the casing to open and to close the connections alternately; a pinion secured to the valve; a fixed frame having spaced racks to engage the pinion; a fixed trough supported above the tank; and a scraper upon the trough, positioned adjacent the frame.

2. In a device of the class described, a supporting structure; telescoped tubular -members secured together for simultaneous rotation in the structure; means for supplying pressure to the interior of one of said members; means for supplying suction to the interior of the other of said members; a valve casing; a pipe connecting the interior of the valve casing with the interior of one of said members; a pipe connecting the interior of the valve casing with the other of said members; a filter frame disposed radially of said members, and having a single opening into the casing; a valve rotatable in the casing, and provided with In testimony that I claim the foregoing sinuous ports ther'ethrough, adapted sucas my own, I have hereto afiixed. my signacessively, when the valve is disposed in ture in the presence of two witnesses. successive positions of rotation, to establish CHARLES EDWARD SINGER. communications between the said pipes and Witnesses:

the opening; and means for rotating the T. H. GRAOY, valve. H. W. FORBES. 

